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Page 61 / 77 Scroll up to view Page 56 - 60
Advanced Settings
61
Wireless Cable Voice Gateway CG3700EMR-1CMNDS
5.
Click the
Add Service
button.
The following screen displays:
6.
In the Service Name field, type a descriptive service name. No spaces are allowed in this
field.
7.
In the Service User list, select
Any
(the default) to allow any computer on the Internet to use
this service. Otherwise, select
Single address
, and enter the IP address of one computer to
restrict the service to a particular computer.
8.
Select the service type, either
TCP
or
UDP
or
TCP/UDP
(both). If you are not sure, select
TCP/UDP.
9.
In the Triggering Starting Port field, enter the number of the outbound traffic port that causes
the inbound ports to open.
•
If the application uses a single port, enter the same port number in the Triggering
Ending Port field.
•
If the application uses a range of ports, enter the ending port number of the range in
the Triggering Ending Port field.
10.
In the Triggering Ending Port field, enter the number of the outbound traffic port that causes
the inbound ports to close.
11.
Enter the inbound connection port information in the Starting Port, and Ending Port fields.
12.
Click the
Apply
button.
The service displays in the Port Triggering Portmap Table.
Dynamic DNS
If your Internet service provider (ISP) gave you a permanently assigned IP address, you can
register a domain name and have that name linked with your IP address by public Domain
Name Servers (DNS). However, if your Internet account uses a dynamically assigned IP
address, you do not know in advance what your IP address is, and the address can change
frequently. In this case, you can use a commercial Dynamic DNS service. This type of service
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Advanced Settings
62
Wireless Cable Voice Gateway CG3700EMR-1CMNDS
lets you register your domain to their IP address and forwards traffic directed at your domain
to your frequently changing IP address.
If your ISP assigns a private WAN IP address (such as 192.168.x.x or 10.x.x.x), the Dynamic
DNS service does not work because private addresses are not routed on the Internet.
Your gateway contains a client that can connect to the Dynamic DNS service that
DynDNS.org provided. First visit their website at
and obtain an
account and host name that you configure in the gateway. Then, whenever your
ISP-assigned IP address changes, your gateway automatically contacts the Dynamic DNS
service provider, logs in to your account, and registers your new IP address. If your host
name is hostname, for example, you can reach your gateway at http://hostname.dyndns.org.
To set up Dynamic DNS:
1.
Select
ADVANCED > Advanced Setup > Dynamic DNS
.
The following screen displays:
2.
Register for an account with one of the Dynamic DNS service providers whose URLs display
in the Service Provider list.
3.
Select the
Use a Dynamic DNS Service
check box.
4.
Select the URL of your Dynamic DNS service provider.
If your Dynamic DNS service provider is DynDNS.org, for example, select
www.dyndns.org
.
5.
Type the host name (or domain name) that your Dynamic DNS service provider gave you.
6.
Type the user name for your Dynamic DNS account.
This name is the name that you use to log in to your account, not your host name.
7.
Type the password (or key) for your Dynamic DNS account.
8.
Click the
Apply
button.
Your configuration is saved.
Page 63 / 77
Advanced Settings
63
Wireless Cable Voice Gateway CG3700EMR-1CMNDS
Remote Management
The remote management feature lets you access your gateway over the Internet to view or
change its settings.
Note:
Be sure to change the gateway default login password to a secure
password. The ideal password contains no dictionary words from
any language and contains uppercase and lowercase letters,
numbers, and symbols. It can be up to 30 characters. See
Set
Password
on page
41.
To set up remote management:
1.
Select
ADVANCED > Advanced Setup > Remote Management
.
2.
Select the
Turn Remote Management On
check box.
3.
Under Allow Remote Access By, specify the external IP addresses to be allowed to access
the gateway’s remote management.
Note:
For enhanced security, restrict access to as few external IP addresses
as practical.
•
To allow access from a single IP address on the Internet, select the
Only This
Computer
radio button. Enter the IP address that will be allowed access.
•
To allow access from a range of IP addresses on the Internet, select the
IP Address
Range
radio button. To define the allowed range, enter a beginning and ending IP
address.
•
To allow access from any IP address on the Internet, select the
Everyone
radio
button.
Page 64 / 77
Advanced Settings
64
Wireless Cable Voice Gateway CG3700EMR-1CMNDS
4.
Specify the port number for accessing the web management interface.
Normal web browser access uses the standard HTTP service port 80. For greater
security, enter a custom port number for the remote web management interface. Choose
a number from 1024 to 65535, but do not use the number of any common service port.
The default is 8080, which is a common alternate for HTTP.
5.
Click the
Apply
button.
Your changes take effect.
When you access your gateway from the Internet, type your gateway’s WAN IP address into
your browser’s address or location field followed by a colon (:) and the custom port number.
For example, if your external address is 134.177.0.123 and you use port number 8080, enter
in your browser.
Universal Plug and Play
Universal Plug and Play (UPnP) helps devices, such as Internet appliances and computers,
to access the network and connect to other devices as needed. UPnP devices can
automatically discover the services from other registered UPnP devices on the network.
Note:
If you use applications such as multiplayer gaming, peer-to-peer
connections, or real-time communications such as instant
messaging or remote assistance (a feature in Windows XP), enable
UPnP.
To turn on Universal Plug and Play:
1.
Select
ADVANCED > Advanced Setup >
UPnP
.
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Advanced Settings
65
Wireless Cable Voice Gateway CG3700EMR-1CMNDS
2.
Specify the following settings:
•
Turn UPnP On
.
UPnP can be enabled or disabled for automatic device configuration.
The default setting for UPnP is enabled. If this check box is not selected, the gateway
does not allow any device to control the resources automatically, such as port
forwarding (mapping) of the gateway.
•
Advertisement Period
.
The advertisement period is how often the gateway
broadcasts its UPnP information. This value can range from 1 to 1440 minutes. The
default period is 30 minutes. Shorter durations ensure that control points have current
device status at the expense of more network traffic. Longer durations can
compromise the freshness of the device status, but can significantly reduce network
traffic.
•
Advertisement Time to Live
.
The time to live for the advertisement is measured in
hops (steps) for each UPnP packet sent. The number of hops can range from 1 to
255. The default value for the advertisement time to live is four hops, which is fine for
most home networks. If you notice that some devices are not being updated or
reached correctly, you should increase this value.
3.
Click the
Apply
button.
Your settings are saved.
The UPnP Portmap Table displays the IP address of each UPnP device that is accessing the
gateway and which ports (internal and external) that device has opened. The UPnP Portmap
Table also displays what type of port is open and whether that port is still active for each IP
address.

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